https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89931
Bug ID: 89931
Summary: Incorrect compiler error with temporary object used as
function arguments
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dchneric at gmail dot com
Target Milestone: ---
Created attachment 46076
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46076&action=edit
zip package including source and temp files
The following code
---
#include <iostream>
void foo(const char**) { std::cout << "do something"; }
int main() {
using argT = const char*[];
foo(argT{"a", "b"});
return 0;
}
---
errors out due to following error:
---
main.cpp:7:9: error: taking address of temporary array
foo(argT{"a", "b"});
---
However, at line 7, adding std::move before invoking foo(), i.e.:
---
foo(std::move(argT{"a", "b"}));
---
suppresses the error.
Other compilers like MSVC, ICC, Clang does not have this issue.
-------------------
VERSION & SYSTEM:
gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)
Target: x86_64-linux-gnu
Thread model: posix
INSTALL CMD:
apt-get install
COMPILATION FAILURE DETAIL:
% gcc -Wall -Wextra main.cpp -o a.out
main.cpp: In function int main() :
main.cpp:7:9: error: taking address of temporary array
foo(argT{"a", "b"});
^~~~~~~~~~~~~~
MORE INFO:
https://stackoverflow.com/questions/55463861/why-does-passing-a-temporary-object-as-an-argument-need-stdmove
